The mortgage securitization process is playing an increasingly dominant role in how residential mortgage loans are financed, gobbling up a record 74.3 percent of primary market originations during the first quarter of 2006. According to the Inside Mortgage Finance MBS Database, a whopping $498.1 billion of home loans were pooled in securities during the first quarter of this year. That accounted for 74.3 percent of the $670 billion of mortgages originated in the primary market… [One data table included]